Casper sheets are light and breathable for a feathery softness that feels barely there. The Casper Sheet set includes 1 flat & fitted sheet, and 2 pillowcases. 100% long-staple cotton. 360 thread count. Hybrid twill weave. OEKO-TEX® 100 certified — the highest standard that guarantees the sheets are safe enough for babies and children. Machine wash cold on a gentle cycle with like colors. Tumble dry low.